Java's equivalent to .Net's AutoResetEvent?

Question

What should I use to get semantics equivalent to AutoResetEvent in Java? (See this question for ManualResetEvent).

Answer 1

I believe what you're looking for is either a CyclicBarrier or a CountDownLatch.

Answer 2

I was able to get CyclicBarrier to work for my purposes.

Here is the C# code I was trying to reproduce in Java (it's just a demonstration program I wrote to isolate the paradigm, I now use it in C# programs I write to generate video in real time, to provide accurate control of the frame rate):

using System;
using System.Timers;
using System.Threading;

namespace TimerTest
{
    class Program
    {
        static AutoResetEvent are = new AutoResetEvent(false);
        static void Main(string[] args)
        {
            System.Timers.Timer t = new System.Timers.Timer(1000);
            t.Elapsed += new ElapsedEventHandler(delegate { are.Set(); });
            t.Enabled = true;
            while (true)
            {
                are.WaitOne();
                Console.WriteLine("main");
            }
        }
    }
}

and here is the Java code I came up with to do the same thing (using the CyclicBarrier class as suggested in a previous answer):

import java.util.Timer;
import java.util.TimerTask;
import java.util.concurrent.CyclicBarrier;

public class TimerTest2
  { static CyclicBarrier cb;
    static class MyTimerTask extends TimerTask
      { private CyclicBarrier cb;
        public MyTimerTask(CyclicBarrier c) { cb = c; }
        public void run() { try { cb.await(); } catch (Exception e) { } }
      }
    public static void main(String[] args)
      { cb = new CyclicBarrier(2);
        Timer t = new Timer();
        t.schedule(new MyTimerTask(cb), 1000, 1000);
        while (true)
          { try { cb.await(); } catch (Exception e) { }
            System.out.println("main");
          }
      }
  }

(Apologies for not indenting the Java code by 4 spaces as suggested in this site's Formatting Reference.)